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Among the most eye-catching features of the BMW i8 Spyder Concept are the upward-swivelling, windowless doors and a range of purpose-oriented on-board equipment including electric kickboards stowed under a transparent tailgate. The sports car is based around the innovative LifeDrive architecture, itself underpinned by a lightweight modular construction and the use of high-quality high-tech materials....
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The BMW i8 Spyder Concept is a plug-in hybrid powered by an eDrive drivetrain combining a high-performance electric motor and petrol combustion engine. The lithium-ion battery supplying the motor with power can be recharged in an extremely short space of time from any domestic power socket. Together, the car’s minimised weight, low centre of gravity and finely judged balance, coupled with a combined system output of up to 260 kW (354 hp), promise unbeatable dynamic capability, exceptional efficiency and unbridled driving pleasure.
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The BMW i8 Spyder Concept with eDrive is a plug-in hybrid combining two different power sources and employing the specific advantages of its electric motor and combustion engine to optimum effect. The hybrid drivetrain’s key components gel together with outstanding smoothness, allowing it to offer peerless dynamic capability and maximum efficiency. In other words, the open-top two-seater produces the performance of an out-and-out sports machine yet posts the fuel economy of a small car.
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The 96 kW (131 hp) electric motor on the front axle works in tandem with a turbocharged three-cylinder petrol engine sending 164 kW (223 hp) through the rear wheels. Both units are in-house BMW Group developments and generate an aggregate system output of 260 kW (354 hp) and peak torque of 550 Newton metres. That is enough to accelerate the BMW i8 Spyder Concept from 0 to 100 km/h (62 mph) in five seconds on the way to an electronically governed top speed of 250 km/h (155 mph). Despite this performance, the two-seater burns just three litres of petrol per 100 kilometres (equivalent to fuel economy of 94 mpg imp) in the European test cycle.
The electric motor sources its energy from a lithium-ion battery which can be fully charged from a domestic power socket in less than two hours. The high-output battery is located in the energy tunnel between the front and rear axle modules in order to keep the car’s centre of gravity as low as possible – and therefore to maximise the car’s dynamic performance. The space-saving and well-balanced packaging of this and other drive and chassis components gives the sporting two-seater ideal 50:50 weight distribution.
With its battery fully charged, the BMW i8 Spyder Concept can cover up to 30 kilometres (19 miles) on electric power alone. As such, far from filling in as a bit-part player, the electric motor plays a role equal to that of the petrol engine. If required, a high-voltage alternator hooked up to the combustion engine generates extra power, which is then stored in the hybrid battery. This range-extending function during the course of a journey allows the two-seater to travel further between charging stations.
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